Cyber Resilience

CVE-2025-36136

DoS in Ibm Db2 11.5.0 – 11.5.9

Published
07 November 2025
Modified
19 November 2025
Patch / advisory
CVSS Score v3.1 5.1
Click a component to see what it means
Raw vectorCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0010 1th percentile
Risk Priority 35 floored blend · peak EPSS

Summary

CVE-2025-36136 is a medium-severity Allocation of Resources Without Limits or Throttling (CWE-770) vulnerability in Ibm Db2. Its CVSS base score is 5.1 (Medium).

Operationally, ranked at the 1th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SC-5 (Denial-of-service Protection) and SC-6 (Resource Availability) — see the control section below for these in your framework.

EU & UK References

Vulnerability Data

IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.3 for Linux, UNIX and Windows (includes DB2 Connect Server) could allow a local user to cause a denial of service due to the database monitor script incorrectly detecting that the instance…

more

is still starting under specific conditions.

CWE(s)

Related Threats

CVEs Like This One

CVE-2025-3050Same product: Ibm Db2
CVE-2025-0915Same product: Ibm Db2
CVE-2025-36070Same product: Ibm Db2
CVE-2024-28762Same product: Ibm Db2
CVE-2024-31881Same product: Ibm Db2
CVE-2025-36008Same product: Ibm Db2
CVE-2025-1000Same product: Ibm Db2
CVE-2025-36387Same product: Ibm Db2
CVE-2025-36122Same product: Ibm Db2
CVE-2025-36123Same product: Ibm Db2

Affected Assets

ibm
db2
11.5.0 — 11.5.9 · 11.5.0 — 11.5.9 · 11.5.0 — 11.5.9

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)
  • SC-5 Denial-of-service Protection
  • SC-6 Resource Availability
  • SI-2 Flaw Remediation
Detect
Catch it (NIST detect / respond)

Harden
Shrink the surface (DISA STIG)
  • 5 hardening rules · 3 OS baselines
Validate
Prove the fix (OWASP ASVS)
  • V15.4.4

Mitigating Controls (NIST 800-53 r5) AI

prevent

Directly requires mechanisms to protect against denial-of-service conditions caused by resource exhaustion or faulty monitoring logic in the Db2 instance-startup script.

prevent

Mandates controls that ensure availability of system resources, mitigating the incorrect 'still starting' detection that leads to uncontrolled resource consumption.

prevent

Requires timely remediation of software flaws such as the CWE-770 allocation error in the database monitor script.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.IR-04 mostly match
degrades

Monitoring capacity and taking action to maintain availability directly reduces unchecked resource allocation.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

detects

Baseline comparison of CPU, memory and bandwidth usage helps surface uncontrolled resource allocations before they cause service degradation.

prevents

Capacity projections and elasticity measures ensure that allocation requests are bounded and can be throttled, reducing the window in which an attacker can force unbounded resource reservations.

mitigates

Defining retention periods and deletion schedules for backup copies prevents indefinite accumulation of data on storage media without corresponding resource-management controls.

mitigates

Architectural redundancy and automatic failover limit the impact of an attacker who forces excessive allocations, because spare capacity can absorb the load until the primary instance recovers.

none

Documented incident response procedures that include activation of continuity plans and controlled recovery help ensure that resource consumption triggered by an incident is bounded and managed rather than left unbounded.

none

Mandating tested continuity procedures that preserve or replace resource-limiting controls prevents an attacker from exploiting the absence of throttling mechanisms during an outage.

References